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Analog Devices Inc./Maxim Integrated MAX4123ESA-T
- Part No.:
- MAX4123ESA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4123ESA-T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,335
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Product details
Overview
MAX4123ESA-T from Maxim Integrated is a single, rail-to-rail input/output operational amplifier optimized for low-voltage, low-power precision signal conditioning. It features 5MHz gain-bandwidth product, 200µV max input offset voltage, 650µA quiescent current per amplifier, ±1.35V to ±3.25V dual or +2.7V to +6.5V single-supply operation, and integrated shutdown mode reducing supply current to 25µA. It is widely used in battery-powered data-acquisition systems requiring high accuracy and wide common-mode range.
For engineers reviewing the MAX4123ESA-T datasheet, MAX4123ESA-T pinout, MAX4123ESA-T application, or MAX4123ESA-T equivalent, key selection criteria include rail-to-rail I/O swing at 2.7V supply, shutdown functionality with high-impedance output state, 5MHz bandwidth with unity-gain stability, drive capability into 250Ω loads, and compatibility with capacitive loads up to 500pF.
Technical Context
The MAX4123ESA-T employs a composite NPN/PNP rail-to-rail input stage enabling common-mode voltage range extending 250mV beyond VEE and VCC. Its output stage delivers true rail-to-rail swing with <150mV headroom under 250Ω load at VCC = 5V. The amplifier is unity-gain stable and exhibits no phase reversal when inputs are overdriven.
It integrates a dedicated SHDN pin that places the output in high-impedance state and reduces quiescent current to 25µA per amplifier. Input bias current polarity reverses near mid-supply due to input stage switching, requiring matched source impedances to minimize offset error.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 5MHz - supports closed-loop designs up to ~100kHz with gain ≥50 while maintaining phase margin. |
| Input Offset Voltage | ±200µV max - enables DC-coupled sensor interfaces with ≤0.02% error at 1V output. |
| Supply Current | 650µA per amplifier - allows continuous operation in sub-1mA system power budgets. |
| Shutdown Current | 25µA per amplifier - reduces total system standby power by >95% vs active mode. |
| Output Drive | 250Ω load - directly interfaces with ADC reference buffers, DAC outputs, or analog switches without external buffering. |
| Capacitive Load Stability | Stable with 500pF - eliminates need for isolation resistors in most filter or cable-drive applications. |
| Common-Mode Range | VEE − 0.25V to VCC + 0.25V - accepts signals from ground to supply rail in single-supply configurations. |
Pinout & Package
MAX4123ESA-T is housed in an 8-pin SO (Small Outline) package with standard JEDEC MS-012AC footprint (5.0mm × 4.0mm, 1.27mm pitch). Pin 1 is marked with a dot or bevelled corner.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output - rail-to-rail swing, high-impedance during shutdown. |
| 2 | IN− | Inverting input - differential pair node; polarity of input bias current changes near VCC/2. |
| 3 | IN+ | Noninverting input - same input stage topology as IN−; requires matched source impedance for offset minimization. |
| 4 | VEE | Negative supply / ground - referenced for single-supply operation; substrate tied to this pin. |
| 5 | SHDN | Shutdown control - logic-low (<0.8V) disables amplifier and forces output high-Z; floating or >2V enables operation. |
| 6 | N.C. | No connect - internally unconnected; must remain unconnected on PCB. |
| 7 | VCC | Positive supply - accepts +2.7V to +6.5V; bypass with 0.1µF ceramic + 1µF bulk capacitor. |
| 8 | N.C. | No connect - internally unconnected; must remain unconnected on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Extends 250mV beyond supply rails - enables direct interfacing with sensors or DACs operating at rail voltages. |
| Rail-to-rail output voltage swing | Swings within 150mV of VEE and VCC into 250Ω - maximizes dynamic range in low-voltage systems (e.g., 3V ADC references). |
| Integrated shutdown mode | Reduces supply current to 25µA and places output in high-impedance state - supports power-gating in portable instrumentation. |
| No phase reversal on overdrive | Prevents latch-up or erroneous output transitions when inputs exceed common-mode limits - improves robustness in transient-prone environments. |
| Stable with 500pF capacitive load | Eliminates need for output isolation resistors in anti-aliasing filters or long-trace routing - simplifies layout and preserves bandwidth. |
Applications
| Battery-Powered Instruments | Portable Data Loggers |
|---|---|
Use Scenario: Handheld multimeter front-end amplifying mV-level thermocouple or shunt voltage signals. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with rail-to-rail input accepting 0–3.3V sensor outputs and driving SAR ADC reference input. Use Value: 200µV offset ensures <0.01% measurement error at full scale; 650µA supply current extends battery life to >500 hours on two AA cells. | Use Scenario: Low-power environmental sensor node conditioning analog outputs from humidity, pressure, and temperature ICs. IC Role / Device Role / Timing Role: Signal conditioner enabling wake-on-event architecture - active only during sampling bursts, shut down between readings. Use Value: 25µA shutdown current reduces average system current to <1µA in sleep mode; rail-to-rail I/O supports 1.8V MCU interface without level shifters. |
| Precision Data-Acquisition Systems | Low-Voltage Industrial Sensors |
Use Scenario: 16-bit industrial DAQ module digitizing 4–20mA loop signals with cold-junction compensation. IC Role / Device Role / Timing Role: First-stage amplifier in isolated analog front-end, rejecting common-mode noise while preserving DC accuracy. Use Value: 80dB CMRR at DC and 78dB PSRR ensure <1LSB error contribution from supply ripple or ground bounce in noisy plant environments. | Use Scenario: Analog output stage for smart transmitters powering 2-wire 4–20mA loops from 3.3V supplies. IC Role / Device Role / Timing Role: Buffered voltage-to-current converter driver with rail-to-rail output swing ensuring full 0–20mA compliance. Use Value: Ability to drive 250Ω loads to within 150mV of rails enables full-scale current generation even at minimum 3.3V supply - no boost required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA333AIDBVR | Zero-drift architecture; 0.02µV/°C offset drift vs. MAX4123ESA-T's ±2µV/°C; 350kHz GBW vs. 5MHz; no shutdown pin. | Better long-term DC stability in temperature-varying environments; unsuitable for AC-coupled or wideband signal paths. | Select OPA333AIDBVR when ultra-low drift dominates over bandwidth and power-down capability. |
| AD8605ARTZ-REEL7 | 2.2MHz GBW; 65µV max offset; 1mA supply current; no shutdown; rail-to-rail I/O; 10nV/√Hz noise vs. 22nV/√Hz. | Lower noise and offset, but higher quiescent current and no power management - less suitable for battery operation. | Select AD8605ARTZ-REEL7 when lowest noise and offset are critical and continuous operation is acceptable. |
Compared with OPA333AIDBVR and AD8605ARTZ-REEL7, MAX4123ESA-T uniquely balances 5MHz bandwidth, rail-to-rail operation, 25µA shutdown, and 650µA active current - making it optimal for portable, wideband, low-power precision amplification where dynamic power control is essential.
Availability
MAX4123ESA-T is available at Aetrix Electronics and suitable for battery-powered instruments, portable data loggers, and precision data-acquisition systems requiring stable component supply across extended production lifecycles.
Supply support for MAX4123ESA-T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs high-performance analog and mixed-signal semiconductor solutions for industrial, communications, computing, and consumer markets.
The MAX4122–MAX4129 family was engineered specifically for low-voltage, rail-to-rail signal conditioning in space-constrained, battery-operated equipment - emphasizing precision, speed, and power efficiency without sacrificing robustness.
FAQ
What is the operating supply voltage range for the MAX4123ESA-T?
The MAX4123ESA-T operates from a single supply of +2.7V to +6.5V or dual supplies of ±1.35V to ±3.25V. It maintains specified performance across this range, including rail-to-rail input common-mode voltage extension beyond the rails by 250mV. At 2.7V, it typically functions down to 1.8V, though datasheet limits and guaranteed specs begin at 2.7V.
Does the MAX4123ESA-T support rail-to-rail input and output operation?
Yes, the MAX4123ESA-T supports true rail-to-rail input common-mode voltage range (VEE − 0.25V to VCC + 0.25V) and rail-to-rail output voltage swing (within 150mV of VEE and VCC into 250Ω). This enables full utilization of supply voltage headroom in low-voltage systems such as 3V data-acquisition front-ends.
How does the shutdown feature work on the MAX4123ESA-T?
The MAX4123ESA-T's SHDN pin disables the amplifier when pulled below 0.8V, reducing supply current to ≤25µA per amplifier and placing the output in a high-impedance state. Pulling SHDN ≥2V or leaving it floating enables normal operation. Turn-on time is 1µs typical, and shutdown delay is 0.2µs - enabling fast power cycling in duty-cycled systems.
Can the MAX4123ESA-T drive capacitive loads, and if so, how large?
Yes, the MAX4123ESA-T is stable with capacitive loads up to 500pF without external compensation. This is confirmed in the datasheet's "Capacitive Load Stability" section and verified via phase margin measurements. For loads >500pF, a series isolation resistor (e.g., 39Ω) at the output restores stability while preserving signal integrity.
What is the maximum output current capability of the MAX4123ESA-T?
The MAX4123ESA-T can deliver ±50mA short-circuit output current (per absolute maximum ratings), but its specified linear output drive is 250Ω - meaning it maintains rail-to-rail swing and specified distortion while sourcing/sinking current sufficient to develop full-scale voltage across a 250Ω load. Output voltage swing degrades gradually beyond this, not abruptly.
MAX4123ESA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 2V/µs
- Gain Bandwidth Product:
- 5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 50 nA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 725µA
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 6.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX4123ESA-T FAQ
1.How can I place an order for MAX4123ESA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4123ESA-T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX4123ESA-T reliable?
The price and inventory of MAX4123ESA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4123ESA-T is usually 5 days.
3.What payment methods are accepted for MAX4123ESA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4123ESA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4123ESA-T?
MAX4123ESA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4123ESA-T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX4123ESA-T?
For technical support, including MAX4123ESA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4123ESA-T requirements.
6.How does Aetrix verify that MAX4123ESA-T is sourced from the original manufacturer or authorized distributors?
All MAX4123ESA-T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX4123ESA-T meets industry standards.
7.What is the process for return or replacement of MAX4123ESA-T?
All MAX4123ESA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4123ESA-T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX4123ESA-T part is unused and in its original packaging.
Return procedure for MAX4123ESA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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